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US 2017/0302834 A1Published application
Light-emitting diode and surveillance camera device using the same
AssigneeLigitek Electronics Co., Ltd.
InventorsHSIAO-WEN LEE, I-HSIN TUNG
Life of this patent
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Abstract
A light-emitting diode (LED) includes s a substrate, a LED chip, and an optical lens. The LED chip is fixedly mounted to the substrate for emitting a light beam. The optical lens is mounted to the substrate and covers the LED chip. The optical lens has a light exit surface, which directs the light beam from the LED chip to travel in a direction along an optical axis to form a non-symmetric light shape. Also disclosed is a surveillance camera device that uses the LED. As such, the drawback of a conventional surveillance camera being incapable of acquiring an excellent image due to light source being overly concentrated can be eliminated.
Claims19
A light-emitting diode (LED) that provides high intensity, coverage, and homogenous illumination, the LED comprising, in combination:
- a substrate that has an installation surface;
- a wiring layer, which is formed on the installation surface;
- an LED chip, which is directly mounted on the installation surface and is in electrical connection with the wiring layer, the LED chip being square in shape and comprising an optical axis;
- and
- an optical lens that is overmolding on and fixedly mounted to the installation surface to encapsulate the LED chip such that the optical lens has no air gap with respect to the substrate and the LED chip, the optical lens being asymmetric and formed of a light transmitting material, the optical lens being formed to comprise a light exit surface, wherein a large width extension direction of the light exit surface is defined as an X-axis direction;
- a small width extension direction of the light exit surface is defined as a Y-axis direction, wherein the X-axis direction and the Y-axis direction are perpendicular to each other;
- and a direction perpendicular to the installation surface is defined as a Z-axis direction, wherein the light exit surface protrudes from the installation surface in the Z-axis direction, the light exit surface being formed of at least two curved surfaces having different curvatures;
- wherein a surface middle portion of light exit surface is recessed along the optical axis to define a divergent surface and an outer portion of the light exit surface extends toward the installation surface to define a convergent surface;
- wherein the divergent surface has negative diopter and the convergent surface has positive diopter;
- and
- wherein a light beam emitting from the LED chip travels in a direction along the optical axis and is subjected to refraction by the divergent surface and the convergent surface to form a non-symmetric light shape having high homogeneity.
8 more elements
A surveillance camera device, comprising:
- a casing;
- an image capturing element, which is arranged inside the casing to capture an image;
- and
- at least one light-emitting diode (LED), which is arranged at one side of the image capturing element to provide lighting necessary for the image capturing element to capture the image, the at least one LED comprising a substrate, a wiring layer, and at least one LED chip, and an optical lens, wherein the substrate comprises an installation surface;
- the wiring layer is formed on the installation surface;
- the LED chip is fixedly mounted to the installation surface and in electrical connection with the wiring layer, wherein the LED chip has an optical axis and the optical lens is fixedly mounted to the installation through overmolding to encapsulate the LED chip, such that the optical lens has no air gap with respect to the substrate and the LED chip, the optical lens being asymmetric and formed of a light transmitting material, the optical lens being formed to comprise a light exit surface, wherein a large width extension direction of the light exit surface is defined as an X-axis direction;
- a small width extension direction of the light exit surface is defined as a Y-axis direction, wherein the X-axis direction and the Y-axis direction are perpendicular to each other;
- and a direction perpendicular to the installation surface is defined as a Z-axis direction, wherein the light exit surface protrudes from the installation surface in the Z-axis direction, the light exit surface being formed of at least two curved surfaces having different curvatures;
- wherein a surface middle portion of light exit surface is recessed along the optical axis to define a divergent surface and an outer portion of the light exit surface extends toward the installation surface to define a convergent surface;
- and
- wherein a light beam emitting from the LED chip travels in a direction along the optical axis and is subjected to refraction by the divergent surface and the convergent surface to form a non-symmetric light shape having high homogeneity.
8 more elements
Dependencies are inferred from the claim text.